Granted Patent
Utility
US 4,843,527 · App. 07/141,695
Matrix lamp bank display and light filtering assembly
Inventor:
Ira Britt
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Jan 7, 1988
Inventor
Ira Britt
Assignee (at issue)
American Sign & Indicator Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.